But what is the problem if more people with less money would join the project, where is the disadvantage?
My guess would be that the regulations for public offering are much harsher then for a private sale.
I would say they are the same but with public sale you must check much more people and do KYC for them and for private sale you just have few companies or individuals to use KYC on.
I think they don't expect many contributions from a crowdsale. ICOs in general in this time have difficulties to raise money, and for Dusk as a quite complex project it will perhaps even more difficult to attract small investors.